Progress in researching the implosion of nested arrays of mixed composition and the generation of soft x-ray power pulse

Abstract

The results of experiments on the study of plasma compression of nested wire arrays of mixed composition and the generation of powerful pulses of soft X-ray radiation (SXR), carried out on a powerful electrophysical facility Angara-5-1 at a current level of up to 3 MA, are presented. Based on the latest experimental data on the intensity of plasma formation of various substances m& (in μg/(cm2×ns)) [1] and on the features of the dynamics of plasma compression in nested arrays [2], a nested wire array design has been developed which makes it possible to obtain a high peak SXR power in comparison with the known designs of single and nested tungsten wire arrays. During the implosion of nested arrays of mixed composition, consisting of plastic fibers and tungsten wires, shorter and more powerful SXR pulses were obtained with a maximum peak power PSXRmax~10 TW with a FWHM duration of ~5 ns compared to the parameters of SXR pulses upon compression of single tungsten arrays: PSXRmax~5 TW and FWHM~10 ns. Thus, under the conditions of our experiments, we have shown the possibility of a twofold increase in the peak SXR power during compression of nested arrays by optimizing their design.

MARPLE: software for multiphysics modelling in continuous media

“…The qualitative and quantitative agreement of numerical results with the experimental data obtained at Angara facility is discussed in [38]. Thus, the results of modeling with the usage of supercomputers are of fundamental importance for understanding the physics of nonlinear processes in pinch plasma.…”

“…In recent years, a promising pinch configurations were studied at Angara-5-1 facility providing higher energy concentration related to the possibility of 3D compression of ∼ 10 𝜇m wire arrays [38]. Multiwire array implosion was simulated in a series of numerical experiments with 3D plasma flow models.…”